A transitive verb is an action or linking verb that has a complement.
Dictionaries consider all linking verbs transitive. An action verb which is transitive has a direct object. The action is being done to something or someone.
In most dictionaries the abbreviation v.t. means "verb, transitive."
Most verbs can be both intransitive and transitive depending on the sentence.
Intransitive: He runs around the block daily.
(There is no direct object.)
Transitive: He runs a large corporation.
(The verb runs has a direct object, corporation.)